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| Math Central | Quandaries & Queries |
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Question from Jhosseline, a student: prove: sin (pi/2 - x) cot (x + pi/2)= -sinx |
Hi Jhosseline,
Write the cotangent as the cosine divided by the sine and then use the double angle expressions for sine and cosine. These expressions can be found in my response to an earlier question.
Penny
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